Azusa had only been talking big, but she never expected Haruno Sora to suddenly pounce, pinning her down on the bed. The two girls lay tangled together, their round little bottoms pressed against each other.
"Let me go, Sora!" Azusa's face flushed bright red as she tried to grab Haruno Sora's hands, but with the other girl on top of her, she couldn't break free right away.
However, Haruno Sora knew she wasn't as strong as Azusa and would soon be overpowered.
"It's no use. Onii-chan will be here soon to spank you," Haruno Sora teased, deliberately provoking Azusa while glancing meaningfully at Hoshino Ken.
Hoshino Ken was indeed tempted. He had only been joking earlier, never expecting Haruno Sora to actually pin Azusa down.
Azusa squirmed relentlessly. Seeing Hoshino Ken approaching, she raised her slender, well-proportioned legs high, trying to shield her bottom, and snarled, "If you dare come closer, I'll kick you away!"
Hoshino Ken watched as her legs flailed wildly. The girl was so frantic she didn't even care that her skirt had ridden up, like a crab raising its claws to defend itself. He found it oddly amusing.
"Go ahead and try. If you can kick me, I'll be impressed," Hoshino Ken said with a mischievous grin, reaching out toward Azusa. The gesture immediately set off her sensitive nerves.
"Don't come any closer!" Azusa warned, shrinking backward while trying to kick Hoshino Ken away.
Hoshino Ken grabbed her ankles and forced them down. As Azusa shrieked, he moved his hands to her soft waist and began tickling her mercilessly.
Caught off guard, Azusa trembled uncontrollably, as if he'd hit a ticklish spot, and couldn't hold back her laughter.
"W-Wait... Stop, haha... You two... I won't let you get away with this!"
Azusa lay on the bed, laughing and struggling helplessly. Haruno Sora held her hands down while Hoshino Ken pinned her legs, leaving her utterly defenseless against the siblings' assault.
By the time Azusa finally ran out of energy, her face was flushed, and she gasped for breath like a fish out of water, completely drained.
Hoshino Ken glanced over. The girl's skirt failed to cover her pale, tender thighs, which were pressed tightly together, revealing the rounded curve of her bottom, raised high.
Unable to resist, he gave her pert little bottom a light pat. It was warm, firm, and springy, trembling slightly under his touch.
He actually dared to do it! Azusa glared at Hoshino Ken, her face red, but she was too exhausted to even speak, forced to endure the spanking.
However, with just a few light pats, Azusa couldn't help but let out a strange sound. The spots he'd touched felt peculiarly tingly—not painful, but more like a teasing caress.
"Ken really has no shame," Haruno Sora murmured, staring intently at Hoshino Ken.
"Nothing to be ashamed about. The feel is just average—too small," Hoshino Ken replied nonchalantly, as if the whole incident meant nothing to him. "You two play here. I'm going to the study to practice guitar for a bit."
Having taken advantage of the situation, Hoshino Ken was already planning his escape.
Azusa was momentarily stunned, but then, mustering strength from somewhere, she pushed Haruno Sora away in one swift motion and headbutted Hoshino Ken, sending him tumbling onto the bed.
"You jerk, I'm going to kill you today!"
...
Azusa tormented Hoshino Ken for a long time before finally storming home in a huff.
Throughout the entire ordeal, Haruno Sora watched obediently as her brother suffered. As the sweetest little sister, what ill intentions could she possibly have? She only wished Azusa would leave sooner.
After all, it was Hoshino Ken who had taken advantage. She had even helped initially.
Contemplating whether to spank his sly little sister, Hoshino Ken found she had already darted out of the room.
He fell into deep thought. A sister who wouldn't share hardships—maybe he shouldn't indulge her next time?
But that night, Haruno Sora showed up in Hoshino Ken's room with her pillow, slipping under his covers with practiced ease.
Hoshino Ken, still awake, was surprised to feel someone crawling in.
"Onii-chan, let's sleep together tonight," Haruno Sora said, lying beside him, her face slightly flushed, though the dim light of night obscured it.
"Aren't you a bit old to be sleeping with your brother?" Hoshino Ken reached out and pinched her small nose. "Don't you have your rabbit to sleep with?"
"The rabbit isn't you. The best pillow in the world is Onii-chan," Haruno Sora replied, slightly displeased. She lifted Hoshino Ken's arm and nestled comfortably into his embrace, resting her cheek against his arm and gently nuzzling it.
Tonight, Haruno Sora wasn't wearing his shirt but had changed into her own nightgown—a simple white sheer spaghetti strap dress that looked incredibly cute on her.
Because she was so close, Hoshino Ken could see her delicate, pale collarbones beneath the neckline. Her slightly rounded chest was especially soft and tender, and as usual, she wore no restrictive undergarments, as if to allow her "little bunnies" to grow healthily.
Hoshino Ken found her fragrant and soft. Even though they used the same shower gel and shampoo, the girl somehow smelled better than he did.
"You still smell like Azusa here. I need to rub it off so Onii-chan won't think of her tonight!" Haruno Sora seemed to know exactly what Hoshino Ken was looking at. A mischievous smile played on her lips as she confidently hugged him, wrapping her legs around him.
"Wait, stop moving around," Hoshino Ken said, raising a hand to stop her but accidentally brushing against the girl's soft body. Her smooth, delicate shoulders were so tender that even a slight touch made her straps slip down.
Hoshino Ken instinctively glanced over, feeling his mouth go dry. As he tried to adjust his position, his hand brushed against her slender waist. With the girl clinging to him, it was inevitable that he would touch the soft, rounded curve of her bottom—just the right size to fit in his hand.
Haruno Sora froze, her eyelashes fluttering slightly. Her shimmering eyes gazed directly at Hoshino Ken, the tips of her ears slowly turning red.
"Onii-chan, your reaction seems to be getting more intense," Haruno Sora said shyly. The moment she hugged him, she could feel something pressing against her.
"It's because you're tempting me," Hoshino Ken gritted his teeth, feeling somewhat embarrassed.
"I didn't expect it to happen so fast. I thought I'd have to put in more effort," Haruno Sora murmured, then revealed a slightly proud expression. "It seems I really am Onii-chan's favorite little sister. Just touching me gets a reaction."
Though Haruno Sora still retained a hint of youthful innocence, Hoshino Ken had to admit that after tasting a bit of sweetness with her, he couldn't help but feel stirred by her.
Perhaps it was his youthful body, easily influenced by hormones. Even with his rationality intact, Hoshino Ken found it impossible to control these primal, instinctive reactions.